Linux setup SSH login without password

Recently in the toss Hadoop, to use the host without password login, set up the time encountered some problems, here to record a bit.

Suppose a requires no password to login B.

Then the first need to use Ssh-keygen on a to generate the Id_rsa.pub public key, when generated, a return, the file is generated in the ~/.ssh directory.

Append the contents of the Id_rsa.pub file in the previous step to the ~/.ssh/authorized_keys file of machine B and set the Authorized_keys permission of B to 600.

In theory, you can use SSH B on a to login B without a password at this point.

Problem encountered: or Prompt for password. Check the configuration, there is no problem, restart the machine, incredibly can, surprised Ah?

Linux setup SSH login without password